Operating mechanism for pumps.



N. A. SWE-NSSON.

OPERATING MECHANISM FOR PUMPS.

APPLcAToN FILED DEC. s. 1913.

1,150, 553 PateitedAu 17,1915.

2 SHEETS-SHEET 2.

n harro NELS A. SWENSSON, OF DENVER, GOLORADO.

OPERATING MECHANISM FOB. PUMPS.

msonte To all whom, it may concern Be it known that I, NELsA. SwnNssoN, a citizen of Sweden, but has taken out first papers for citizenship in the'Unted States, residing at Denver, in the County of Denver and State of Colorado, have invented new and useful Improvements in Operatng Mechanism for Pumps, of which the following is a speeification. I

The primary 'purpose of the nventon s the provision of unique actuatng means for pumps whereby the 'strokemay be vared to meet existing conditions with the result that the wear and tear upon the pump cylnder and piston rod is reduced to the smallest amount possible.

Another purpose of the nventon s the provision of pump operating means embodying* relativel movable bearngs whch may be shifted roni one point of ad ustment to another and Secured at the desred oint by suitable fastening "means, the obect being to admit of vafying the length of the stroke from one to six feet, more or less, with the result that the wear upon the cylinder and valves is materially reduced for the same Volume of water elevated by the ordinary pump.

A further purpose of the invention 'is the Construction of the Operating means whereby the same is provided with a pair .of sprocket wheels and a chain with fixed pins, said chain being arranged to travel around the sprocket wheels and provided with one or more pins' or projections which are adapted to engage a yoke connected with the plunger rod to impart positive reciproeating movement thereto.

The invention consists of thenovel features, details of Construction and combina- Fig. 4: is an enlarged view of the upper portion of the yoke showing the sprocket wheels and sprocket chain in coperative relation therewith. Fig. 5 is a section on the line 2-2 of Fig. 4:. Fig. 6 is an enlarged sectional view of the puinp head showing more' Speciflcation of Letters Patent.

Patented Aug. ll?, te 15..

Application filed December 16, 1913. Serial No. 807,155.

clearly the connecting means between the pump rod and yoke. Fig. 7 is a detail View showing a portion of the sprocket chain whereby the same may be lengthened or Shortened to vary the stroke of the pump. Fig. 8 is an enlarged vertical sectional view illustrating a portion of the frame and bearings.

Corresponding and like parte are referred to in the following description, and indicatedin all .the-views' of the drawings, by the same reference characters.

The supporting frame for the Operating mechanism embodies standards 1. A shaft 2 is mounted in suitable bearings at the top of the supporting frame and is adapted to be driven in any manner from a suitable source of power. A sprocket wheel 3 is fast to the shaft 2 so as to rotate therewith. A second shaft 4 is mounted in bearings 5 which are vertically adjustable to admit of varying the distance between the shafts 2 and 4. The supporting frame is of such Construction as to admit of the bearings 5 being adjusted vertically and secured in the adjusted position by suitable fastening means. A sprocket wheel 6 is Secured to the shaft 4. A sprocket chain 7 passes around the sprocket wheels 3 and 8 and is of such Construction as to adnit of links being removed or others replaced to admit of the length of the sproclltet ehan being varied so that the stroke of the pump may he adjusted to meet existing requirements. Certain links of the sprocket chain 7 are constructed in any well known manner to admit of the removal or insertion of one or' more whereby the required length of sprocket chaip may be obtained. The sprocket chain is provided in its length with one or more pins or projections 8 which are adapted to make positive engagement with the yoke so 'as to efieot a reciproeating movement thereoi'. I

The yoke 9 is relatively long and slender and comprises similar vertical members connected at their upper and lower ends, the

vertical members being of channeled form so as to receive the vertical runs of the sprocket chain and opposite end portions of the sprocket wheels. This Construction ad mits of the parts mutually guiding one another with the result-that they are held in a fixed relative position. Each ofthe vertical members ot the yoke is of substantially U-form in cross section and comprises side plates andan intermediate plate, the several' plates being foldedor otherwise fa'stened after being assembled. One o'r more notche 10- ae formed 'along the inner edge of one of the vertical members of the yoke and a corresponding notch or rnotches 11 are forme& inthe edge of the opposte vertical member. These notches 10 and 11 constitute stops which are engaged by the pins or projections 8 of the chain so as to efiect a positive movement of the yoke.& The notches.10 face upward where'as the notches 11 face downward.

The pin or projection on ,the down run: of the sprocket chain 'engages the stops 10 whereas the pin or projectio'n on the up run V of the sprocket chain. engages the stops 11.

The' projections'8 leave* one setof stops be fore engaging the other set. It is .noted that the ends of a ,pin 8 project .so as to provide` 'engaging parte at opposite sides of the chan 'of any make or variety and is provided' at its upper end with ahead 13 through' which a pump rod 14 passe's,a`stufiing box 15 being r provided at the upper end of the head 13 to 35 maintain a close joint. 'The upper end of the pump I`0d 14: passes through an opening in the lower cross piece of the yoke and is Secured thereto in any manner. A spring 15 is interposed between the lower end of .the

yoke and the pump head, and serves to relieve hock or injury to the valves in the event of the Operating chain 7 breaking. v

When the parts are properly assembled and the pump is in operation the shaft 2`is positively driven and imparts a rotary movement to (the sprocket cha in 7. The yoke 9 is moved'downward by the projections 8 engagingthe stops 10 and is moved upward by or adding such projection's jengaging the stops 1 1.

i When it is required to vary the 'stroke 'of the' pump the shaft 4 is moved up or down by shifting the bearings 15, the latter being seeured in the adjusted position by 'suitable fastenings in the maner herein stated. `The sprocket chain 7 is adapted to renew relation of the shafts 2 and 4 either by removing I links thereta' The Variation in the lengthof the Operating chain 7 results in changing the stroke of the pump as will be .readily' appreciated.

From the foregoing description taken in connection with 'the accompanying drawing, the advantages of the Construction and of the method of operation will be "readily ap-w parent to those skilled in' the art to which the invention appertains and while I have described the principle of operation ofthe invention, together with the device-which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes maybe made when desired as are within the scope of the claim appended hereto.

I claim Pump operating mechanism comprising an endless member provided with' 'a projection and a yoke adapted to be connected with the pump and embodying spaced parallel channeled members-serving as a runway or guide for the endless member and eachprovided on their inner face with a series of stops, the stops of one memberhaving a straight horizontal surface facing upwardly and the stops of the other member presenting a straight horizontal surface facing downwardly, the said-projections adapted to be engaged by the projection of the endless member, whereby a positive reciprocating movement is imparted to the yoke. I

In testimony whereof I afiix my signature in presence of two witnesses. NELS A. SWENSSON.

Witnesses:

ALBERT RUNNNG, W. B. CROWLEY. 

